Aqueous, acidic solution and method for electrolytically depositing copper coatings as well as use of said solution
CA 2532445 C · Owner: Bauer, Gunther · Inventors: Bauer, Gunther; Fels, Carl Christian; Dahms, Wolfgang
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The aqueous acidic solution for electrolytically depositing high polish decorative bright, smooth and level copper coatings on large area metal or plastic parts contains a) at least one oxygen-containing high molecular , additive and b) at least one water soluble sulfur compound wherein the , solution additionally contains c) at least one aromatic halogen derivative having the general formula (I), wherein R1 R2, R3, R4, R5 and R6 are each , independently radicals selected from the group comprising hydrogen aldehyde, acetyl, hydroxy, hydroxyalkyl having 1 - 4 carbon atoms alkyl having 1 - 4 , carbon atoms and halogen with the proviso that the number of residues R1 R2, R3, R4, R5 and R6 …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed July 28, 2004 and granted March 13, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 28, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 28, 2026.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
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Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.